from django_redis import get_redis_connection
from redis import RedisError
from rest_framework import serializers
import logging
logger = logging.getLogger('verify_codes')


class ImageCodeCheckSerializer(serializers.Serializer):
    image_code_id = serializers.UUIDField()
    text = serializers.CharField(max_length=4, min_length=4)
    def validate(self, attrs):
        image_code_id = attrs['image_code_id']
        text = attrs['text']

        redis_conn = get_redis_connection('verify_codes')
        real_image_code_text = redis_conn.get('img_%s' % image_code_id)
        if not real_image_code_text:
            raise serializers.ValidationError('图片验证码无效')

        try:
            redis_conn.delete('img_%s' % image_code_id)
        except RedisError as e:
            logger.error(e)

        real_image_code_text = real_image_code_text.decode()
        if real_image_code_text.lower() != text.lower():
            raise serializers.ValidationError('图片验证码错误')

        mobile = self.context['view'].kwargs['mobile']
        send_flag = redis_conn.get("send_flag_%s" % mobile)
        if send_flag:
            raise serializers.ValidationError('请求次数过于频繁')

        return attrs
